Peavey 684 Music Mixer User Manual


 
26. MAIN LEVEL: This is the master level control for the main mix sent to the Left/Mono and Right output
jacks. This control sets the Main level going to the power amp when in Main/Monitor mode (see System
Mode #24). A good starting position for this control is the center detent position (12:00).
27. PHANTOM POWER SWITCH: Applies 48 V DC voltage to all input XLR connectors to power micro-
phones that require it.
CAUTION! When phantom power is switched on, make sure that any channel you are plugging a mic into is
turned down in both the main and monitor mixes. Otherwise, there will be a loud pop in the PA. This is
normal. It is best to plug all mics into their respective channels with the phantom power switched off.
This reduces noise in the PA and reduces the chances of the mic being damaged. If phantom power is used,
do not connect unbalanced microphones or other devices that cannot handle this voltage to the XLR inputs.
(Some wireless receivers may be damaged; consult their manuals for compatibility.) The line input 1/4" jacks
are not connected to the phantom supply, and are safe for all inputs (balanced or unbalanced). An unbal-
anced-to-balanced impedance converter, such as the Peavey 5116 or a Peavey 1:1 Interface Adapter, can
also be used to isolate a mic from phantom voltage.
28. EFX DEFEAT: This 1/4" jack accepts an on/off 1/4" footswitch (Peavey Pt. #00051000) to defeat the
effects of both the Main and Monitor mixes.
29. MONITOR OUTPUT: This 1/4" jack provides an output from the monitor mix to supply external power
amp/monitor combinations. The level of this signal is determined by the Monitor Level control.
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